Honing tool



NOV. 26, 1946. I J KLINE 2,411,545

' HQNING TOOL Filed Jan. 18, 1945 2 Sheets-Sheet 2 INVENTOR r of thesingle stone Patented Nov.- 26, 1946 UNITED STATE s PATENT OFFICE signorto Micromatic troit, Mich.,

I Application January 1 18 Claims. (01. 51-184A) This invention relatesto honing tools, and particularly to a new and novel honing tool of thesingle stone type.

The present honing tool comprises a tubular body having a rotatable rodtherein provided with a cam surface which engages the carrier for thestone for moving the stone outwardly of the axis of the body. As onemeans for rotating the cam, an axially movable element is mounted withinthe tube having engagement with the rotatable cam member for turning themember when the element is moved axially. The axially movable member isprovided with a head which engages an adjusting element of a honingmachine, and the body is secured to a flanged adapter by which the toolis supported in the machine.

The abrasive stone is mounted in a spring carrier which snaps over theend of the tubular body portion with the carrier in position to beengaged by thecam. The carrier portion engaging the cam is movedoutwardly against the tension in the body-engaging portion thereof. Thistension retains the stone against the cam and reduces the diameter ofthe tool when the cam is reversely rotated'to present a portion ofreduced thickness to the carrier portion. The reaction to the radialforce applied to the abrasive tool is taken at two spaced points at theopposite side of the carrier which extends beyond the body on eitherside of a flat provided thereon. Any wear which may occur to the carrierdoes not affect the life of the tool, since the carrier and the stoneare the renewable portions thereof.

Accordingly, the main objects of the invention are: to provide a toolwith a single stone mounted on a resilient carrier which retains thestone against the cam member and on the tool body, to provide a toolbody with an outwardly movable stone which is involutely adjustable,relative tothe axis of the body, by a rotatable cam element; toconstruct a tool from a tubular body having a cam rod therein which isrotated by an axially movable member which is retained against rota tionrelative to the body; toprovide a honing tool with a stone carrierfwhichencompasses the end portion of the body and provides spring-likeretraction for the stone and abutments which take the reaction to theradial force 'appliedto the stone; and, in general, to provide a honingtool type which is simple in construction, positive of operation, andeconomical of manufacture.

,Other objects and features of novelty of this invention will bespecifically pointed out orwili.

Hone Corporation, Dea corporation of Michigan s, 1943, Serial No.472,701

. for the tool.

the carrier become'apparent, when referring, for a better understandingof the invention, to the following description, taken in conjunctionwith the accompanying drawings, wherein:

Figure 1 is a view in side elevation of a honing tool embodying featuresof this invention;

Fig. 2 is an enlarged sectional view of the tool illustrated in Fig. 1;

Fig. 3 is a view of structure, similar to that iilustrated in Fig. 1,with parts in section taken at an angle to the section of Fig. 2, asillustrated in Fig. 4 by the section line 3-3 thereof;

Fig. 4 is a sectional view of the structure illustrated in Fig. 2, takenon the line 4-4 thereof;

Fig. 5 is an end view of the structure illustrated in Fig. 2;

Fig. 6 is an enlarged broken top plan view of the stone end of the toolillustrated in Fig. 1;

Fig. '7 is a'sectional view of the structure illustrated in Fig. 6,taken on the line 1-! thereof with the stone in retracted position; and

Fig. 8is a view of structure similar to that illustrated in Fig. '7,with the stone shown in worn condition and in expanded relation to thetool body.

In the figures, the honing tool comprises a tubular body In having anaperture ll forming a bearing surface for the lower end of the cam rodl2. The cam rod I2 is axially secured to the body-portion by a pin l3which projects within slots' l4 and IS in the upper end of the bodyportion, as illustrated more clearly in Fig. 4. A counter-bored portionl6 of the body receives the: tubular portion I! of the actuating elementIB The tubular portion is provided with helical slots l9 and 2| whichreceive the pin i3 for rotating the cam rod l2 when the actuatingelement '18 is moved axially. The counter sunk portion [6 of the body [0has a key slot 22 extending the length thereof for receiving a key 23deflected from the tubular portion I! of the actuating element I8. Thisis illustrated more clearly in Fig. 3, and. is employed for the purposeof preventing the'relative rotation between the actuating element l8and. the body II]. The pitch of the helix relative to the length of theactuating member I8 is such as to rotate the rod I2 from the positionillustrated in Fig. '7, in which the cam permits the stone to retractfully, to that illustrated in Fig. 8, when the cam has expanded itsmaximum amount.

It will thus be seen that, when the actuating element 18 is movedaxially, the adjusting rod I2 is rotated about its axis through theoperation of the helical walls of the slots l9 and 2| which operate thepin i3 projecting through the cam rod l2. In the particular structureillustrated, the actuating element 18 is provided with a head 24 whichengages the adjustable element of a honing machine which moves theelements axially. A flanged adapter 25 is attached to the body portionin by a set'screw 25, and is so constructed as to be positioned in themachine by the dowel 27 for supporting the tool in the machine. Themachine rotates and reciprocates the tool in the usual manner, andsuperimposes a longitudinal movement to the actuating element I8 foradjusting the abrasive stone of the tool to either increase cr decreaseits distance from the tool axis. In Fig. l, the tool supporting head ofthe machine 53, which is rotated and reciprocated, carries a sleeve 54which receives the flange adapter- 25 of the tool having an aperture forreceiving the dowel 21 thereof. The adapter is supported on the sleeve54 by the flanged collar 52 which is threaded thereon. The head 24 ofthe actuating element. I81 is supported in a recess in a longitudinallyadjustable element within the head 53 where it is retained by thelocking ball 5| which engages a groove in the head 24. The head 24. isadjustable longitudinally of the body It), while the entire tool isrotated and reciprocated through the attachment of the adapter 25 on'theend of' the head. 53. which is rotated and reciprocated. For a furtherdescription of the machine and the supporting, adjusting and drivingelements thereof, reference-may be had to the copending application ofDouglas T. Peden, Serial No. 365,526, flledNovember 13, 1940, andassigned to the assignee of the present invention,

As illustrated in Figs. 5, 7, and 8, the end of the body portion H]. iscut away at 28 and provided with aflat portion 29 on the opposite side.A recess 31' is provided in the outer wall of the body for receiving thearcuate portions 32 of the stone carrier 33; the top end of which isflanged outwardly at 3.4 against which the honing stone 35 abuts. A tab36'is struck upwardly from the carrier element 33 in parallel relationto the flange 34 for engaging the opposite side of the stone 35 from"that contacting the flange 34. Suitable adhesive material. is employedfor securing the stone tothe web portion of the carrier between theflange 34 and the tab 36.

The arcuate portion 32 of the remaining arcuate portion of the tool bodyWithin the recess 31- where it is retained against rotation by aninwardly directed flange 31 on its oppositev end. The end portion of thecam rod 12 iscut away to form a cam surface 33 which engages the webportion of the carrier on the opposite side from that to which the stoneis securedfor moving the web portion of the carrier: and the stoneoutwardly of the axis of the tool body. Upon the reverse rotation of therod, the spring tension in the carrier 33 returns the stone to itsretracted position, as illustrated in Fig. 7-. In Fig. 8, the carrier isillustrated in maximum adjusted position, which occurs when the stonebecomes Worn or a larger bore is being honed; After the stone ha Wornbeyond useful thickness, the carrier and stone are removed as a unit,and it is only necessary to snap a new carrier' within the recess 3i inthe body to have the tool ready for further operation.

It will be noted. that the'stone extends beyond the carrier to the endof the tool body In so that blind hole honing may be performed by thehoning stone. The cut-away portion 29 is employed to relieve the bodyfrom any pressure which the carrier engages might occur to the carrierportion 32 diametrically opposite to the stone 35. The bearing of thecarrier against the cylinder bore occurs on each side of the cut-awayportions 29 at the points ii and 42. This stabilizes the stone and tooland prevents chatter because of the three-point contact obtained betweenthe two points 4! and 42 andthe surface of the stone'35. Any wear whichmay occur to the carrier at these points will be insignificant,especially since the carrier is renewed when a stone is replaced on thetool. This eliminates any Wear on the tool body itself, so that the onlyexpendable portion of the tool will be the carrier tfi'an'd'the stone35.

What is claimedjs:

l. A honing tool, including, in combination, a tubular body'portionhaving the wall cut away to form a recessed portion communicating withthe interior of the body portion, a rod rotatable within said bodyportion, a cam on said rod adjacent to said recessed portion, anabrasive stone supported in said-recessfor movement outwardly'andinwardly thereof by said cam, and-longitudinally movable means in theinteriorof said body for rotating said rod.

2. A honing tool including, in combination, a tubular body portionhaving the wall cut away to form a flat portion on one side thereofcommunicating with the interior of the body portion, a rod rotatablewithin said body portion, a cam on said rod adjacent to'said flatportion and movable outwardly thereof, an abrasive stone supported insaid flat portion for movement outwardly and inwardly thereof by saidcam, and an axially movable element disposed within said body forrotating said rod.

3. In a honing tool, a body, a honing stone supported in said body, arotatable cam within said body fixed against axial movement foradlusting the position of said stone, and an axially movable elementWithin the interior of said body fixed against rotation relative theretofor rotatin'gsaid cam.

4. In a' honing'tool, a body'having a recessed portion, a carrierencompassing saidbody and extendingwithin said. recessed portion, astone on that portion of saidcarrier which extends within said: recessedportion, and means within the body for moving said stone outwardly ofthe body axis.

5. In a honing tool, a' body having a recessed portion, a spring carrierencompassing'said' body and extending Within said recessed portion, astone supported by that portion of said carrier which extends withinsaid recessed portion, and means within the body for moving said stoneoutwardly of the body axis, the tension in said carrier tending to movesaid stoneinwardly of the body.

6. In a honing tool, a body portion having the end provided with flatportions opposite sides thereof, a spring carrier disposed about saidbody portion extending over the flat portions thereof, a stone on thatportion of said carrier which extends within one of said flat portions,and means for moving said stone outwardly of the body axis to engage. acylinder wall which is'engaged by the carrier at points on oppositesideszof the flat portion opposite-to that containing saidlstone.

' 7. In a honing tool,.a hollow cylindrical body portion having. flatportions disposed on substantially opposite sides at one. end thereofwith one portion extending through theinner wall of the body portion, astone carrier sprung over the body portion across both of the flatportions thereof, a stone mounted on the portion of the on substantiallycarrier which is disposed in the flat portion extending through theinner wall of the body portion, a cam engageable with the carrierportion supporting the stone for moving the stone relative to the axisof the body portion to engage the Wall of a cylinder, the reaction towhich is taken by points on the carrier on opposite sides of said otherflat portion,

8. In a honing tool, a tubular body portion, a rotatable rod securedagainst longitudinal move-, ment within said body portion, a cam on saidbody portion projectable within a recess in the body portion, a tubularactuating element extending in the body portion, to which it is securedagainst relative rotation and which is provided with means for rotatingthe rod when moved am'ally, a carrier encompassing the body, and a stonemounted on the portion of the carrier opposite to said cam which movesthe stone outwardly relative to the tool axis.

9. In a honing tool, a tubular body portion, a rotatable rod securedagainst longitudinal :movement within said body portion, a cam on saidbody portion projectable within a recess in the body portion, a tubularactuating element extending in the body portion to which it is securedagainst relative rotation and which is provided with means for rotatingthe rodwhen moved axially,

a carrier encompassing the body, and a stone mounted on the portion ofthe carrier opposite to said cam which moves the stone outwardlyrelative to the tool axis, said carrier being tensioned' to retain thestone-supporting portion of the carrier against the cam.

10. In a honing tool, a tubular body portion, a rotatable rod securedagainst longitudinal movement within said body portion, a cam on saidbody portion projectable within a recess in the body portion, a tubularactuating element extending in the body portion, to, which it is securedagainst relative rotation and which is provided with means for rotatingthe rod when moved axially, a carrier encompassing the body, a stonemounted on'the portion of the carrier opposite to saidcam which movesthe stone outwardly relative to the tool axis, and a head on saidtubular actuating element by which the element is secured to anadjusting portion of a machine.

11. In a honing tool, a tubular body portion, a rotatable rod securedagainst longitudinal movementwithin said body portion, a cam on saidbody portion projectable within a recess in the body portion, a tubularactuating element extending in the body portion, cured against relativerotation and which is provided with means for rotating the rod whenmoved axially,

a stone mounted on the portion of the carrier opto which it is seacarrier encompassing the body,

-the flat face portion,

posite to said cam which moves the stone outwardly relative to the toolaxis, a head on said tubular actuating element by which the element issecured to an adjusting portion of a machine, and a flanged bushing onsaid cylindrical body portion by which the tool is supported in saidmachine. l 7

12. In a honing tool, a hollow cylindrical body, a tubular elementwithin the body having helical slots, means for preventing relativerotation between the body and tubular element, a rotatable rod withinthe body portion, a pin extending through the helical body forpermitting the rod to rotate while retaining it against axial movement,a cam on the rod, a stone carrier mounted on the cylindrical bodyportion, and a stone on said carrier movable outwardly of the bodyportion by said cam.

13. In a honing tool, a cylindrical body having a flat portion, a springcarrier encompassing and supporting itself on said body at the flatportion, means for moving said carrier outwardly of said flat portion,and a stone supported by the portion of said carrier extending in saidflat portion of said body. g

14. A stone and carrier unit for a honing tool, including, incombination, an annular spring strip having an arcuate portion and aflat portion and a honing stone supported by said flat portion.

15. A stone and carrier unit for a honing tool including, incombination, an annular carrier substantially D-shaped in section, and ahoning stone secured to the flat face of the section opposite to thecurved portion thereof.

16. A stone and carrier unit for a honing tool including, incombination, an annular carrier made from a spring having a flat faceand an arcuate portion forming a D shape in section, and a honing stonesecured to the outer surface of the flat face portion thereof.

17. A stone and carrier unit for a honing tool including, incombination, an annular carrier made from a spring having a fiat faceand an arcuate portion forming a D shape in section, and a honing stonesecured to the outer surface of the one end of said stone extendingbeyond the arcuate portion of said carrier.

18. A honing tool including, in combination, an annular carrierapproximating a'D-shape in section, an abrasive element mounted on theflat portion thereof, attacking means on said carrier by which it isdriven in rotation, and means for flexing the carrier to move theabrasive element in a substantially radial direction with respect to theaxis of said carrier.

JOHN E. KLINE.

slots into radial slots in the

